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What is the pvp element? Just clan battles in the style of 3rd person Total War?
There's not too much there at the moment, you essentially have a deathmatch/team deathmatch mode with up to 100 players. Siege mode with up to 100 players, and captain battles where it's 6v6, but each player gets a squad of bots to command. All separate from the single player stuff.
It's slightly chaotic at the moment as there are no proper player dedicated servers, as soon as they come expect to see more organised battles & sieges from the clans, custom maps and most likely a horde mode vs the bots modded in. Will be great fun once it gets going.